After two movies of them being buddies and flirting non-stop, Poppy (Anna Kendrick) and Ciot (Justin Timberlake) are now officially a couple (#cioppy)! As the two grow closer, Poppy discovers that Stump has a secret past. He was once part of her favorite phenom band, BroZone, along with his four brothers: Floyd (Troye Sivan), John Dory (Eric André; Sing 2), Spruce (Daveed Diggs), and Clay (Kid Cudi) . BroZone fell apart when Ciot was still a child, as did his family, and Ciot hasn’t seen his siblings since.

But when Stump’s brother Floyd is kidnapped for his musical talent by a duo of villains – Velvet (Amy Schumer) and Veneer (Andrew Rannells) – Stump and Poppy embark on a complicated and emotional journey to reunite the other siblings and save Floyd from an even worse fate than being a nobody in the world of pop music…